EP0168311A2 - Schleifmaschine mit einem Regelkreis zum Positionieren des Werkzeugschlittens - Google Patents

Schleifmaschine mit einem Regelkreis zum Positionieren des Werkzeugschlittens Download PDF

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Publication number
EP0168311A2
EP0168311A2 EP85401278A EP85401278A EP0168311A2 EP 0168311 A2 EP0168311 A2 EP 0168311A2 EP 85401278 A EP85401278 A EP 85401278A EP 85401278 A EP85401278 A EP 85401278A EP 0168311 A2 EP0168311 A2 EP 0168311A2
Authority
EP
European Patent Office
Prior art keywords
grinding
motor
carriage
glass sheet
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85401278A
Other languages
English (en)
French (fr)
Other versions
EP0168311A3 (en
EP0168311B1 (de
Inventor
Heinz Josef Reinmold
Horst Mucha
Heinz-Dieter Friedrich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vegla Vereinigte Glaswerke GmbH
Saint Gobain Glass France SAS
Original Assignee
Vegla Vereinigte Glaswerke GmbH
Saint Gobain Vitrage SA
Saint Gobain Vitrage International SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vegla Vereinigte Glaswerke GmbH, Saint Gobain Vitrage SA, Saint Gobain Vitrage International SA filed Critical Vegla Vereinigte Glaswerke GmbH
Priority to AT85401278T priority Critical patent/ATE53524T1/de
Publication of EP0168311A2 publication Critical patent/EP0168311A2/de
Publication of EP0168311A3 publication Critical patent/EP0168311A3/fr
Application granted granted Critical
Publication of EP0168311B1 publication Critical patent/EP0168311B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
    • B24B9/10—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of plate glass
    • B24B9/107—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of plate glass for glass plates while they are turning

Definitions

  • the invention relates to a device for grinding the edges of glass sheets comprising a turntable on which the glass sheet is arranged and a grinding tool rotatably mounted on a tool carriage which can be moved relative to the axis. of rotation of the plate, thanks to a carriage controlled by a positioning motor, the grinding tool being held by a pressing device in contact with the edge of the glass sheet under an adjustable grinding pressure.
  • a device of this type is known for example from document EP 0 084 506.
  • the control of the grinding tool is ensured by a positioning motor coupled to a regulation amplifier supplying the voltage applied to the motor and controlled by a feeler member preceding the grinding tool, feeling the edges of the glass sheet.
  • the control signals supplied by the probe are stored in a shift register, pass through it and are then used by the amplifier as set values when the turntable has traversed the angular difference between the points of contact with the glass. on the one hand and the grinding tool on the other.
  • the subject of the invention is a grinding machine allowing shorter grinding cycles and therefore of increased capacity.
  • the invention relates to simpler means for controlling the grinding tool, while obtaining direct control by the glass sheet to be ground.
  • this object is achieved by the fact that for the positioning of the turntable, provision is made to measure the distance between the tool holder and the carriage controlled by the positioning motor which varies according to their relative movement and convert it into voltage, for example by a potentiometer, the output voltage of which serves as a setpoint for the positioning motor of the grinding tool.
  • a grinding machine allows control of the grinding tool depending exclusively on the effective grinding pressure. As soon as this effective grinding pressure declines compared to the set value due to the rotation of the glass sheet, this pressure difference causes a reaction of the pressure device, the movement of which is then itself used for controlling the the grinding tool.
  • the pressing device exerting a set grinding pressure controls the small movements of the grinding tool and also, depending on these relatively small movements, the coarser movements of the grinding tool.
  • the pressing device as well as the tool-carrying carriage follow the movements controlled by the positioning motor, which means that the pressing device is itself inserted between the positioning motor and the grinding tool.
  • a smooth and simple control of the rolling tool is obtained, with a relatively high sensitivity of the regulation circuit and which is only a function of the grinding pressure and small displacements of the grinding tool controlled by the pressing device to compensate for the drops of the grinding pressure value with respect to the set value.
  • the grinding machine according to the invention is suitable for grinding the edges of glass sheets of different shapes and does not require additional installations for memorizing the path of the positioning motor.
  • the grinding device comprises a grinding tool mounted on a support itself placed on a carriage whose position relative to to the axis of rotation of the plate is adjusted by linear displacements. At least one pressure capsule is interposed between the carriage and the support of the grinding tool.
  • the support of the grinding tool can be moved linearly on the carriage, the movement of the support of the grinding tool relative to the carriage generated by an effective variation of the grinding pressure being measured by a distance-voltage converter whose output voltage serves as a control variable for the carriage positioning motor.
  • the linear movements of the support of the grinding tool and of the carriage are therefore superimposed according to this first implementation of the invention.
  • the grinding tool is mounted on a plate supported by an oscillating arm positioned in an adjustable manner with respect to the axis of rotation of the plate supporting the glass sheet.
  • At least one manometric capsule is interposed between the plate carrying the grinding tool and the swinging arm, and according to the invention the pressing device, applying the grinding tool against the edge of the glass sheet according to a regulated pressure, is controlled by signals from the pressure capsule.
  • the articulated arm is disposed on the rotor of a constant torque motor serving as a pressing device and whose body is placed on a plate oriented in rotation by a positioning motor.
  • the rotation of the plate relative to the articulated arm, generated by the effective variation of the grinding pressure, is measured by a distance-voltage converter whose output voltage serves as a regulating variable for the positioning motor of the plate.
  • a distance-voltage converter whose output voltage serves as a regulating variable for the positioning motor of the plate.
  • Figures 1 and 2 illustrate the structure of an edge grinding machine guiding the grinding tool on a linear path.
  • the glass sheet 1, the periphery of which 2 is to be ground, is fixed to the plate 3 mO in rotation about the axis 4 by a drive motor.
  • the grinding tool constituted by a grinding wheel 6 resting on the motor shaft 7 is placed on the tool-carrying carriage 8.
  • the tool-holder 8 is placed on the rails 9 and 10, movable relative to the axis of rotation 4 of the plate 3.
  • the tool holder 8 could be placed on articulated parallelograms, the sliding bearings 9, 10 shown here must then be replaced by the pivoting bearings of the articulated parallelogram.
  • the connecting rod 12 is articulated to the tool holder 8, it transmits to the latter the grinding pressure exerted by the pressing device 13.
  • the pressing device 13 is constituted by a so-called constant torque motor, ie a low inertia DC motor. and with a flat air gap, the torque of which is transmitted to the tool holder 8 by the crank 14, the connecting rod 15 articulated on the crank 14, the pressure capsule 16 and finally the connecting rod 12.
  • the motor or pressing device 13 applies the grinding wheel 6 against the edge 2 of the glass sheet 1 according to an adjustable force.
  • the grinding pressure exerted by the grinding wheel 6 is adjusted by a regulation circuit.
  • the capsule 17 arranged vertically at the capsule 16 is used to determine the effective value of the pres grinding sion.
  • the edge 2 of the glass sheet constantly changing its relative position during the rotation of the glass around the axis 4 and therefore its point of impact on the grinding wheel 6, for the determination of the effective grinding pressure, we provides the two pressure capsules 16, 17, the capsule 16 measuring the pressure component parallel to the direction of movement of the tool holder 8 and the capsule 17 the pressure component acting perpendicular to this capsule 17.
  • the rails 9, 10 on which the tool holder 8 moves are placed on a carriage 26.
  • the rails 27, 28 placed on the plate 34 allow for their part to move the carriage 26 linearly in the direction of the axis of rotation 4
  • the carriage 26 is driven by the positioning motor 30, the rotation of which is converted by the toothed belt 21 into a linear movement along the double arrow F, transmitted to the carriage 26 by the drive spindle 32.
  • the positioning motor 30 is placed on the frame 34 of the machine.
  • the positioning motor 30 is supplied by lines 36, 37 with a regulated voltage and is part of a regulation circuit which is also detailed in FIG. 3.
  • This regulation circuit includes a distance-voltage converter, for example a potentiometer linear 39 disposed on the carriage 26 and at one end of which is applied a positive voltage of for example + 10V, while at the other end is applied a negative voltage of for example - 10V.
  • the cursor 40 rubbing on the potentiometer 39 is placed on the tool holder 8.
  • the voltage taken by the cursor 40 of the potentiometer 39 is transmitted by line 41 as the reference voltage of the regulation amplifier, while the effective value is taken from the tachometer machine 42 coupled with the positioning motor 30 and driven by line 43 to the regulation amplifier.
  • the motor control circuit 45 has mounted on the frame 34 of the machine, a linear potentiometer 46, on which the cursor 47 placed on the car 26 collects the reference voltage led to the regulation amplifier 50 by the line 48 and the switch 49.
  • the regulated supply voltage is finally carried by line 51 to motor 45.
  • the rotation pulse generator 54 coupled with the shaft of the plate 3 or of the drive motor 45, is connected to a programmable counter 55, that is to say provided with a preselector.
  • the preset counter 55 is used to program the angular deviation of the plate 3 for the entire duration of the grinding operation.
  • an angular difference of less than 360 ° can be chosen if only part of the periphery 2 of the glass sheet 1 must be ground. You can also choose an angular difference greater than 360 ° when you want to obtain a more or less wide coverage of the grinding.
  • the regulation circuits of the constant torque motor 13 of the pressing device and of the positioning motor 30 are described with reference to the diagram of the connections shown in FIG. 3.
  • This effective voltage supplies via line 57 the regulating amplifier 58 which also receives via line 59 the regulated reference voltage for example by means of potentiometer 60.
  • a current limiter 62 is inserted on line 24, through which the regulated voltage passes from the amplifier regulation 58 to the constant torque motor 13, a current limiter 62 is inserted.
  • This resistor 62 has the function of simulating 1st an electromotive force for the regulating amplifier 58 during operation, the constant torque motor 13 not supplying electromotive force.
  • a load resistor 64 is coupled by the switch 63 in parallel with the constant torque motor 13.
  • the switch 63 is closed at the start of the grinding operation, that is to say during the start-up phase and is intended to reduce the voltage supplied to the constant torque motor 13, so that the contact between the grinding tool and the edge of the glass sheet takes place smoothly. After this start-up phase, that is to say when the grinding operation itself begins, the switch is again open.
  • the movements of the tool holder 8 generated by the constant torque motor 13 cause the cursor 40 placed on this tool holder 8 to move along the potentiometer 39.
  • On one side of the potentiometer 39 there is a positive voltage by example + 10 V and on the other a negative voltage of for example - 10 V.
  • the cursor 40 ' Placed in the center of the tool holder, the cursor 40 'is pressed in the middle of the potentiometer so that a voltage of + 0 V is applied to the cursor 40. If cursor 40 is moved in one direction or another, it is then applied to it a positive or negative voltage depending on the direction of movement of the cursor, voltage used as a reference value by the control amplifier 66 supplied by the line 41.
  • the tachometer generator 42 mechanically coupled to the positioning motor, supplies the regulation amplifier 66 with its effective voltage.
  • the operating voltage passes through the lines 36, 37 of the regulation amplifier 66 to the positioning motor 30.
  • a load resistor 68 is mounted with the switch 67 which, like the resistor 64 is switched on during the start-up phase of the operation and switched off as soon as the actual grinding begins.
  • the current limiter 69 inserted on line 37 is short-circuited at the end of the start-up phase at the same time as the load resistor 68, using the switch 67 '.
  • the tool holder When the machine is started, the tool holder is first of all placed in the extreme position by the constant torque motor 13, owing to the fact that no effective tension is supplied by the pressure capsules 16, 17 as long as the grinding wheel 6 is not in contact with the edge of the glass sheet.
  • the potentiometer 39 In this extreme position of the tool holder 8, the potentiometer 39 is out of stroke, therefore the positioning motor 30 receives a maximum tension and the carriage 26 is moved towards the glass sheet 1 with maximum speed.
  • the adjustment operation of the constant torque motor 13 begins upon contact between the grinding wheel 6 and the edge of the glass sheet. Simultaneously, the tool holder 8 moves back on the carriage 26 and the cursor 40 oscillates around its central position on the potentiometer 39 and adjusts the positioning motor 30.
  • the speed of rotation of the turntable 3 is controlled only with the potentiometer 46 mounted on the plate 34 and whose cursor 47 is placed on the carriage 26. So that the regulation of the motor 45 driving the turntable 3 is obtained only during the actual grinding operation, simply on the angular deviation programmed using a preset counter, the cursor 47 is connected to the input setpoint of the regulation amplifier 50 by a switch 49 controlled by the preset counter 55.
  • the switch 75 is actuated by the counter 75 and thus the input setpoint 59 of the regulation amplifier 58 is diverted to the line 76.
  • the tool holder 8 is pulled into the rear extreme position by the constant torque motor 13.
  • the cursor 40 is simultaneously moved to the extreme rear position on the potentiometer 39 and the positioning motor 30 directed so that it places the carriage 26 in the rear position.
  • the grinding cycle is then completed and the glass sheet 1 can be removed and replaced by another glass sheet.
  • FIG. 4 differs from that shown in Figures 1 and 2 simply by the fact that the grinding tool, schematically represented by the grinding wheel 6, is not disposed on a tool carriage with linear movements but is placed at the end of an oscillating arm 71 in rotation about the axis 72, the grinding tool 6 thus describing a circle passing through the axis of rotation 4 of the plate 3.
  • the grinding tool schematically represented by the grinding wheel 6
  • the positioning motor 30 communicates to the plate 73 the rotational movement around the angular difference E necessary for positioning.
  • the body of the constant torque motor 13, formed by a low inertia DC motor with a flat gap is fixed. concentrically around the axis 72, on the plate 73 rotated, so the motor 13 accompanies the movements controlled by the positioning motor 30.
  • the rotor of the constant torque motor 13 actuates the articulated arm 71.
  • the motor 13 produces the regulated grinding pressure, the regulation circuit again comprises two pressure capsules 16, 17 arranged between the articulated arm 71 and the tool holder as well as a computer assembly 56, a regulation amplifier 58 and a reference potentiometer 60.
  • the regulation of the positioning motor 30 is again obtained by the regulation cycle comprising the potentiometer 39 giving the setpoint voltage, the regulation amplifier 66 and the tachometer machine 42, generating the effective voltage.
  • the potentiometer 39 is in this case formed by a rotary potentiometer so that the resistance body of the potentiometer 39 is coupled with the plate 73 and that the cursor 40 is coupled with the articulated arm 71.
  • the control of the plate 73 by the positioning motor 30 and the regulation of the grinding pressure by the constant torque motor 13 are driven exactly as previously described for FIG. 3.
  • the speed of rotation of the plate 3 is also regulated in accordance with what has been described for FIG. 2, except that in this case, the potentiometer 46 giving the set value is also formed by a rotary potentiometer whose cursor 47 is coupled to the axis of rotation 72 of the articulated arm.
  • Switch 49 is again controlled by the preset counter 59, as is switch 72 which, when the grinding operation has been carried out, brings the voltage passing through line 72 as an input setpoint of the amplifier control 58 so that the constant torque motor 13 of the grinding tool is away from the edge of the glass sheet.
  • the setpoint voltage used for regulating the grinding pressure and supplying the regulating amplifier 58 via line 59 can in certain cases be modified according to a preset program. Such a modification of the grinding pressure during grinding is for example necessary when it is necessary to grind glass sheets having acute or rounded angles. In these cases, a lower grinding pressure should be used for the angles.
  • a suitable programming device comprises a series of potentiometers adjusted according to different set values which, depending on from the position of the grinding tool along the periphery of the glass sheet, are switched one after the other and thus provide different setpoint values on line 59. Such a programming device is described in detail in patent publication EP 0 084 506.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Machine Tool Units (AREA)
EP85401278A 1984-06-30 1985-06-25 Schleifmaschine mit einem Regelkreis zum Positionieren des Werkzeugschlittens Expired - Lifetime EP0168311B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85401278T ATE53524T1 (de) 1984-06-30 1985-06-25 Schleifmaschine mit einem regelkreis zum positionieren des werkzeugschlittens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3424258A DE3424258C2 (de) 1984-06-30 1984-06-30 Maschine zum Kantenschleifen von Glasscheiben
DE3424258 1984-06-30

Publications (3)

Publication Number Publication Date
EP0168311A2 true EP0168311A2 (de) 1986-01-15
EP0168311A3 EP0168311A3 (en) 1987-12-09
EP0168311B1 EP0168311B1 (de) 1990-06-13

Family

ID=6239608

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85401278A Expired - Lifetime EP0168311B1 (de) 1984-06-30 1985-06-25 Schleifmaschine mit einem Regelkreis zum Positionieren des Werkzeugschlittens

Country Status (5)

Country Link
US (1) US4648210A (de)
EP (1) EP0168311B1 (de)
JP (1) JPS6130371A (de)
AT (1) ATE53524T1 (de)
DE (2) DE3424258C2 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0233159A3 (en) * 1986-02-04 1989-10-11 Societa' Italiana Vetro - Siv - S.P.A. An improved machine for grinding the edges of a sheet of glass, particularly for automobile windows
EP0673715A4 (de) * 1992-12-18 1995-05-26 Bando Kiko Co Maschine zum bearbeiten einer glasplatte.
US5807166A (en) * 1994-07-21 1998-09-15 Bando Kiko Co., Ltd. Glass-plate working machine

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US4881347A (en) * 1988-01-27 1989-11-21 Petrin Mario Ski repairing machine
US5040342A (en) * 1988-10-11 1991-08-20 Ppg Industries, Inc. Method and apparatus for processing glass sheets
US6257957B1 (en) 1999-12-01 2001-07-10 Gerber Coburn Optical Inc. Tactile feedback system
EP1747846A1 (de) * 2005-07-25 2007-01-31 Rollomatic S.A. Verfahren und Vorrichtung zum Messen einer Schneidkante zum Schleifen
SE529606C2 (sv) 2006-02-10 2007-10-02 Tj Utveckling Ab Verktygsinställare för en slipmaskin
US20100248594A1 (en) * 2009-03-31 2010-09-30 Darrel Nish Setup tool for grinder sharpening jigs
DE102016110651A1 (de) * 2016-06-09 2017-12-14 Bystronic Lenhardt Gmbh Vorrichtung und Verfahren zum Besäumen von Glastafeln
CN109366288B (zh) * 2018-12-16 2024-03-01 浙江工业大学 一种用于马桶圈的恒力矩自动修边装置
CN109702585A (zh) * 2018-12-16 2019-05-03 浙江工业大学 一种用于马桶盖的恒力矩自动修边装置
CN116572112B (zh) * 2023-07-14 2023-09-12 盐城市大丰区礼盛新材料科技有限公司 一种循迹式异形玻璃磨边装置

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DE2646062C3 (de) * 1976-10-13 1979-08-09 Vereinigte Glaswerke Gmbh, 5100 Aachen Numerisch gesteuerte Modellschneidemaschine für Glasscheiben
JPS5493288A (en) * 1977-12-31 1979-07-24 Bando Kiko Co Glass chamfering machine
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0233159A3 (en) * 1986-02-04 1989-10-11 Societa' Italiana Vetro - Siv - S.P.A. An improved machine for grinding the edges of a sheet of glass, particularly for automobile windows
EP0673715A4 (de) * 1992-12-18 1995-05-26 Bando Kiko Co Maschine zum bearbeiten einer glasplatte.
US5807166A (en) * 1994-07-21 1998-09-15 Bando Kiko Co., Ltd. Glass-plate working machine

Also Published As

Publication number Publication date
US4648210A (en) 1987-03-10
JPS6130371A (ja) 1986-02-12
DE3578142D1 (de) 1990-07-19
EP0168311A3 (en) 1987-12-09
EP0168311B1 (de) 1990-06-13
DE3424258A1 (de) 1986-01-23
DE3424258C2 (de) 1986-12-11
ATE53524T1 (de) 1990-06-15

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